Combined pocket door-lock and burglar-alarm



J. A. LEE, Sr. l OOMRINED DOOKET DOOR LOOK AND RDROLAR ALARM. No. 243,926.

` (Model.)

Patented July 5, 1881.

ATTORNEYS UNITEDl STATES PATENT OFFICE.

JOHN A. LEE, sE., 0E oHAfrrANooeA, TENNESSEE.

COMBINED POCKET DOOR-LOCK AND BURGLAR-ALARM.

SPECIFICATION formingpart of Letters Patent No. 243,926, dated July 5, 1881.

Application tiled April 14, 1881. (Model.)

To all whom t may concern:

Be it known that I, JOHN A. LEE, Sr., of Chattanooga, in the county of Hamilton and State of Tennessee,liave invented a new and Improved Combined Pocket Door-Lock and Burglar-Alarm, of which the following is a full, clear, and exact description.

The invention consists, principally, of a sliding bolt for locking the door, window, or transom, and of a hammer for causing an alarm, the bolt and hammer being operated by mechanism attached to and contained in a small case, the case being adapted to be attached to the door, window, or transom by a hinged claw-plate.

The invention further consists in the construction ofthe claw-plate,whereby the device is adapted to be secured to doors, windows, or transoms of any size or form, and whether the same be close-tting or not 5 also, in the construction and combination of parts, as hereinafter fully described and claimed.

In the accompanying` drawings, Figure 1 shows a top view of my invention as it appears when attached for locking the door. Fig. 2 is a front elevation, with the front plate of the casing removed. Fig. 3 is a cross-section taken on the line w x of Fig. 2. Fig. 4 is a section taken on the line y y of Fig. 2; Fig. 5, a plan view of the revolving slotted locking-bolt tumbler; and Fig. 6 is a perspective view of the claw-plate.

Similar letters of reference indicate corresponding parts.

The mechanism for operating the lockingbolt and hammer is inclosed in the shell A, the bottom of which is provided with the perforated and shouldered stud a, slotted stud a', and the pivot-headed stud a, and is closed by the centrally-perforated front plate, B, which is held in place by suitable screws.

To one edge of the casing is hinged the plate c, the turned ends of which form the ways in which the adjustable claw-plate C moves.

To the corners of the casing is pivoted the hammer D and the trigger E, the former in a suitable slot cut through the sides of the casing. The hammerl) is formed with the extension or lug d, the end of which is cut away so as to form the projections e e', with which the mainspring f and sliding bolt g respectively engage for cooking the hammer and causing the same to deliver its blow. This sliding bolt g is placed diagonally across the interior ot' the casing. One end of it moves in the slotted stud a', while the other end-the one which engages with the projection e of the hammerpasses through the perforation ot' the stud a. The bolt is provided on its upper surface with the pins fi r1', with which the spring h and trigger-lever h engage to move it longitudinally for engaging and disengaging the hainmer. The end ot' the tri gger-lever h protrudes from a suitable slot in the casing, and is in such position as to be moved to disengage the sliding bolt from the hammer by the trigger E, as shown in Figs. land 2. The sliding bolt v g is formed -with the central cut-away place, n, as shown in Fig. 2, for the purpose hereinafter stated. j

The sliding plate or bolt F for locking the door is forced' out of the casing and drawn within it by means ot' the circular plate Gr, which is secured to and revolved by the arbor H, journaled in perforations made in the plates of the casing, the plate F being formed with the slot j,which surrounds the arbor, and also on its upper side with the pin 7c, which moves in the cam-slot g ofthe plate G. The central portion of the arbor H is formed with the hub k', the center of which is cut away upon opposite sides to form the narrow diametrical solid portion l, (shownin Fig. 5.) This solid portion of the arbor serves as another trigger for disengaging the sliding bolt g from the hammer by means of the ends thereof coming against the shoulder formed by the slot n in the said bolt when the arbor is turned by the thumbnut J, secured to the squared end thereooutside the casing, or by a key, if desired. It also serves, when properly turned, as a safety device for keeping the sliding bolt out of engagement with the hammer.

The sliding plate C is provided at one end with the slots s s, through one or the other of which, according to the thickness of the door, thelocking-plate passes when the device is in position for locking the door. The other end of the hinged plate C is provided with the xed claws s. and the folding or hinged claws s, which are of greater length than the fixed claws,which adapt the device to be secured to doors which are not close-tittin g, as well as to those which are.

IOO

It will be observed that the alarm mechanism and the locking mechanism are independent of each other in their action and operationthat is to say, the door may be locked by the device without setting the alarm, and vice versa, and the door may be locked and the alarm mechanism set at the same time, if desired.

In applyingthe device the hinged claw-plate is opened and placed against the casing of the door, using either the fixed or hinged claws, as circumstances require. The door now being closed forcibly causes the claws to be embedded firmlyin the doorcasing. The thumbnut or knob or key is now to be turned, if itis desired to lock the door, to throw out the plate F, which will pass through one or the other of the slots s of the claw-plate, according to the thickness of the door, and pass over the edge of the door, and thus effectively lock it.

If the alarm is to be set, all that is necessary is iirst to provide the hammer with the percussion-paper cap t, or similar detonatin g substance, which will be held in place by the perforated spring t', then to bring the hammer to a cocked position, and to place the trigger E across the edge of the door, as shown in Fig. l, which, should the door be disturbed from the outside, will release the hammer and explode the cap and wake the occupant of the room.

It is obvious that many changes in the de` tails of construction of my invention might be made and not depart from the spirit of my invention. The construction of the parts shown and described are preferred; but I do not confine myself specifically thereto.

As shown and described, the lock is adapted to be attached to the facing of the door, with the trigger and plate F passing across the edge of the door; but by reversing the claws, or providing the end of the plate O with a hinged double claw, the points thereof projecting upon both sides of the plate, it is obvious that this order might be changed when necessary, so that instead of the trigger and plate F the body of the lock would come against the edge of the door.

yHaving thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. .The shell A, having perforated shouldered stud a., slotted stud a', and pivoted stud a, the centrally-perforated front plate, B, the claw-plate C, the hinged plate c, having turned ends, and the pivoted hammer D, having lug d., cutaway to form projections e c', in combination with the mainspring f, the diagonal sliding bolt g, having pins ii', the trigger-lever h, and the spring h,as and for the purpose specifled.

2. rIhe combination, with the bolt F, having slotj and pin 7c, and the hammer D, of the re* volving circular plate G, having cam-slot g', hub 7c', cut away to form portion l, and the sliding bolt g, having a shoulder formed by slot n, as and for the purpose specified.

3. The claw-plate C, the lockingbolt F, and the hammer D, in combination with mechanism, substantially as described, for operating the plate, and mechanism, substantially as described,for cocking and releasing the hammer, as and for the purposes specied.

4. The claw-plate C, provided with the fixed claw s and the hinged claw s, and with a slot or slots, as and for the purposes specified.

5. The sliding claw-plate G, provided with a slot or slots, in combination with the hinged plate (l, substantially as and for the purposes specified.

6. The arbor H, formed with the central collar, 7c', and the narrow diametrical portion l, in combination with the sliding bar g and hammer D, substantially as and for the purposes specified.

JOHN A. LEE, SR.

Witnesses:

A. W. J UDD, L. SCOFIELD. 

